바이오가스를 연료로 사용하는 가스터빈 열병합 발전 시스템의 성능 및 운전 특성 해석

Title
바이오가스를 연료로 사용하는 가스터빈 열병합 발전 시스템의 성능 및 운전 특성 해석
Authors
강도원
Keywords
바이오가스를연료로사용하는가스터빈열병합발전시스템의성능및운전특성해석
Issue Date
2011
Publisher
인하대학교
Abstract
The high fuel flexibility of gas turbines has boosted their use in a wide variety of applications. Recently, the demand for biogas generated from the digestion of organic wastes and landfill as a fuel for gas turbines has increased. We investigatedthe influence of biogas fuels on the performance and operating characteristics ofthe gas turbine. Combined heat and power systems based on two different engines representing modern, small (several MWs), simple, and recuperative cycle gas turbines were simulated. A full off-design analysis was performed to predict the variations in operations due to firing biogas instead of natural gas. A wide range of biogas compositions differing in CH4 content was simulated. Using biogas was predicted to augment the power output in both engines. Power output increased as CH4 content decreased. The main reason is the increase in turbine power due to increased fuel flow. Power generation efficiency increased with decreasing CH4 content in the simple cycle engine, but decreased in the recuperative cycle engine. The heat recovery also increased by firing biogas. However, the increased turbine flow was accompanied by a surge margin reduction of the compressor and overheating of the turbine blade. These two problems are more severe in simple cycle gas turbines. Under-firing would solve the two problems at least partially, but would reduce power output and efficiency. However, specific under-firing to keep the design blade temperature still yielded higher power output than the design value. The two problems might become more severe at high ambient temperatures.
Description
요 약 문 ⅰ Abstract ⅱ Nomenclature ⅲ Greek ⅴ Subscript ⅵ List of Table ⅶ List of Figure ⅷ 목 차 ⅹ 1. 서 론 1 1.1 연구배경 및 연구동향 1 1.2 연구 목적 및 내용 2 2. 가스 터빈 열병합 시스템 모사 3 2.1 시스템 개략도 3 2.2 가스터빈 5 2.2.1 설계 모사 5 2.2.2 탈설계 모사 10 2.3 배열회수 증기발생기 15 2.3.1 설계 모사 15 2.3.2 탈설계 모사 17 2.4 바이오가스 18 3. 결과 21 3.1 설계모사 검증 21 3.2 바이오가스 사용 시 작동특성 개요 23 3.3 바이오가스의 메탄 함량변화가 시스템 성능에 미치는 영향 24 3.4 압축기 운전 조건 28 3.5 터빈 운전 조건 28 3.6 부하경감 운전 31 3.7 외기온 변화에 따른 성능 변화 35 4. 결론 39 참 고 문 헌 40
URI
http://dspace.inha.ac.kr/handle/10505/22449
Appears in Collections:
College of Engineering(공과대학) > Mechanical Engineering(기계공학) > Theses(기계공학 석박사 학위논문)
Files in This Item:
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